these 4 derivations will be built:
  /nix/store/sqkgx1bbhj0jl7p0b9d98yq7pa1j4ci7-clan-cli-source.drv
  /nix/store/4ymr25vg07yklidg56rzcbl2hf5q83v1-clan-cli.drv
  /nix/store/hihjmjlmzv91h6pm96rjw6qbxn1jk7zp-closure-info.drv
  /nix/store/6rj8kar864swsvb0f75g715labclplfv-check-vars.drv
error: path '/nix/store/c365f1dm7psqv4f1p8ggpckynli4f235-check-vars' is not valid
error: Cannot build '/nix/store/6rj8kar864swsvb0f75g715labclplfv-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/c365f1dm7psqv4f1p8ggpckynli4f235-check-vars